When I choose the format to be pdf the following error comes up:

Conversion failed
/System/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python: can't open file '/Users/harry/Downloads/john-1.8.0.9-jumbo-macosx_avx2/run/pdf2john.py': [Errno 2] No such file or directory

However there is no longer a pdf2john.py file it has been replaced with pdf2john.pl